How many half lives has an isotope gone theough if it has 12.5% of the radioactive substance remaining

Answers

Answer 1

Answer:

15.81 years

Explanation:


Related Questions

Proteins are composed of what smaller subunits?
amino acids
fatty acid
nucleotides
nucleic acids

Answers

Answer:amino acids!

Explanation:

When Jorge looks at the Moon from Earth, he sees different phases of the Moon depending on the time of the month he observes the Moon. Why does the Moon have different phases during the month?

Answers

The moon has different phases because it’s around different times. For example, let’s say you go outside and look at the moon at 11pm, then you go and look at it again at 12 pm, it’s going to have a different phase because it’s not at the say time.

I hope this helps! This is what I was getting from the question

Which is not an idea geologists use as they study Earth?

A. The rock record provides evidence of past geological events and life forms.

B. The rock record provides evidence of past human civilizations.

Answers

Answer:

A is the answer.

Explanation:

trust me

CAN SOMEONE PLEASE HELP ME WITH THIS SCIENCE QUESTION I WILL MARK YOU BRAINLIEST THANK YOU

Answers

Answer:

methane

Explanation:

cows produce alot of it and contribute to pollution.

Someone please help me

Answers

Answer: I think its C .

Explanation:

Describe how rodent and human skeleton's are similar in structure and function.
OMG HELP PLS!

Answers

Answer: the functions of the skeleton.  Structure, protection (ribs), allow movement, chemical/physiological: stores calcium and are made up of the same cell tissue.

Explanation:

Ethical concerns about the development and use of biotechnology include all of the following except _______.

I don't understand why some answers are saying my answer is wrong?! please answer to post

Answers

Answer:

Ethical concerns about the development and use of biotechnology include all of the following except concern about the development of new weapons.

In an experiment, Dr.Travis examined the effects of calcium intake on osteoporosis, a condition that causes an increased risk of bone fractures. The amount of calcium ____ variable. The risk of bone fractures _________.
1. A reliable
An independent
A dependent

2. Can be changed by the participants
Can be changed by the researcher
Could change with calcium intake

Answers

Answer:

Part 1.  The amount of calcium is independent variable.

Explanation:

An independent variable is a variable in an experiment which is changed to see its effects on dependent variable.

In this experiment, to know about the causes of osteoporosis, the Ca level in blood or calcium intake in changed.

So the concentration of calcium will be independent variable.

Part 2.

The risk of bone fractures is could be changed with calcium.

Explanation:

In this experiment osteoporosis or risk of bone fracture is dependent variable.

Dependent variable are results of experiment which can be changed by independent variable.

As in experiment, Calcium concentration is independent variable.

So the risk of osteoporosis depends can change with calcium.

basically all you gotta do is search the answer up

When viewing the shape of a human cheek cell, what microscope would most likely be used?
A.) Light
B.) Dissecting
C.) Transmission Electron
D.) Scanning Electron

Answers

Answer:

Your answer Is C!!!!! :)))

Explanation:

A light microscope can be used to view the shape of a human cheek cell. So the correct option is A.

What is a light microscope?

In many research labs, including those using electron microscopes, light microscopes are crucial tools. They can be used to support electron microscopy or as the main viewing tool. The methods used to prepare samples for light microscopy are constantly expanding, and they might include everything from tissue cultures and sliced biological creatures to samples from the sciences of materials and geology.

There are significant parallels between the optical principles of light and electron microscopes. Understanding the operation of a light microscope is essential for both getting the best possible light pictures and comprehending electron microscopy.

We make use of the waveform characteristics of light in microscopy. When generated at a specific source, these waves vibrate perpendicular to the direction of transmission. There are peaks and troughs on every wave. One wavelength is the length of the light ray's onward journey (lambda). The color and intensity of the source affect the wavelength.

Therefore the correct option is A.

Read more about light microscopes, here

https://brainly.com/question/13884997

#SPJ2

Cooperativity is a form of allosteric regulation?
A. True B. False​

Answers

Answer:

b

Explanation:

What are the birds habitat?

Answers

Answer:

Explanation:

Birds can live basically anywhere, but the majority of them are found in forests

Air always moves from pressure to pressure
A.high, low
B. low, low
C.low, high
D.high, high​

Answers

Answer:

C

Explanation:

Air flowing from areas of high pressure to low pressure creates winds. Warm air can hold more moisture than cold air. Air moving at the bases of the three major convection cells in each hemisphere north and south of the equator creates the global wind belts.

Answer:

A. high, low

Explanation:

I have the correct answer.

If two people made the exact same observation, do you think they would necessarily also make the same inference about that observation? Why or why not?​

Answers

Answer:cause you probably won't make exact cause thay sometimes don't pay you exact it denpends on how you work.

Explanation:

The movement of a fluid, caused by differences in temperature, that transfers heat from one part of the fluid to another

Convection

Conduction

Convection Current

Radiation

Answers

Answer:

Convection Current is the answer.

Explanation:

TIME
A chemical reaction that has the general formula of nA - (A)n is best classified as a
reaction

Answers

best classified as a reaction

Which molecule in the equation represents food energy made by plants? A Carbon dioxide B Water C Glucose D Oxygen This is the last one and i will give free brainly points :DDDDD

Answers

Answer:

C

Explanation:

glucose is the product of photosynthesis.

Why might both cell types be considered equally successful

Answers

Answer:

There is a greater diversity of processes within the cell because they have a nucleus and organelles. ... Both cell types can be considered equally successful because they are both surviving in today's ever-changing environment. Archaea can survive in extreme environments and bacteria can grow almost anywhere.

Answer:

Even though there are many different types of cells, they all share similar characteristics. All cells have a cell membrane, organelles organelles, cytoplasm, and DNA.

A change in DNA could alter the amino acid order which will affect the folding of the protein, and therefore it's function. True or false

Answers

Answer:

True

Explanation:

A change in DNA can affect amino acid folding order

how are all the gods, godess, and demo gods connected?

Answers

Answer:

by blood?

Explanation:

Answer:

In Greek mythology, twelve gods and goddesses ruled the universe from atop Greece's Mount Olympus.

Explanation:

Using this information and what you learned about mechanisms of gene expression, why do cats have such fur pigmentation

Answers

Answer:

Explanation:

Gene expression is when information from a gene is used to product a gene product, this product enables to produce protein as the end product.

Phenotype which is the physical expression of the genetic make up gives the gene expression.

Cat having a fur pigmentation indicates the presence of a functional protein that has fur i.e the genetic make up of the cat has fur which give rise to the phenotypic expression.

Select all that apply.
During meiosis II:
chromosomes line up along the middle plate in double file
genetic variation results from crossing over
two diploid daughter cells are formed
sister chromatids split
four haploid daughter cells are formed
formecting

Answers

Four new haploid cells are formed once the sister chromatids within the two daughter cells separate, forming four new haploid gametes.

Which of the following is false regarding the protein pepsin?
A. Pepsin hydrolyzes peptide bonds.
B. Pepsin is a type of protease.
C. Pepsinogen is the active form of pepsin.
D. Pepsinogen self-cleaves at the pH found in the stomach.
E. None of the above are false.

Answers

Answer:

C. Pepsinogen is the active form of pepsin.

Explanation:

Pepsin is a gastric protease belonging to the aspartic proteinase family which breaks down polypeptide chains into smaller peptides by hydrolyzing peptide bonds. Pepsin is found in the gastric juice where it digests proteins from foods together with other digestive enzymes and hydrochloric acid. Moreover, pepsinogen is a precursor of pepsin which is secreted by the gastric chief cells of the human stomach and then is converted into pepsin (its active form) by hydrochloric acid.

PLEASE HELP ASAP!!! I WILL GIVE BRAINLIEST!!!!!!!!!!!!!!!!!!!!

Answers

Answer:

This is your mom you need to find your answers with out cheating!!!!!!!!

Explanation:

I don’t understand this

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me neither tbh i hate school

Which of these actions a sustainable practice

Answers

Answer:

Add more to your question so I can help you

Explanation:

Which type of feedback is more common in the body?
o positive feedback
O negative feedback
O neutral feedback
O electrical feedback

Answers

Answer:

Negative feedback

Explanation:

Negative feedback loops are the most common feedback loops in biological systems. The system acts to reverse the direction of change. Since this tends to keep things constant, it allows the maintenance of homeostatic balance.

Answer:

Negative feedback

Explanation:

Verified correct with test results.

The ______ variable is the data that is collected while doing the experiment .

Answers

The dependent variable is the data that is collected while doing the experiment.

Hope this helps! ^^

The organism shown is ______, and it is a _______.⊕¬

Answers

Answer:

multi-celled; plant

Explanation:

study island

Answer:

multi-celled; plant

Explanation:

Which best describes independent assortment?

In metaphase 1, chromosomes from the mother and father line up on opposite sides of the cell.
In metaphase 1, chromosomes from the mother and father line up randomly along the middle of the cell.
Portions of each chromosome switch sections in the mother’s and father’s chromosomes.
Portions of each chromosome break off and reattach to the original chromosome. ≈∫ plz hurry

Answers

Answer:

The second one.

Explanation:

During metaphase, each of the 46 chromosomes line up along the center of the cell at the metaphase plate.

16)
Lions and tigers would
struggle to coexist in the wild because both animals are large carnivores that a
the same time of the day. These two animals could not occupy the same because they would
in a
relationship.
A)
niche, competitive
B)
trophic level, commensal
C)
habitat, mutualistic
D)
population, parasitic

Answers

Answer:

I think that answer might be B

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